Bob came to China with her mother __________ the third time in 2008.
It is important_________us students to make a plan_________our studies before a new term starts.
After eight hours’ hard work, the firemen finally_________the forest fire.
It ’s our duty to_________people_________too many trees.
—Mum, _________shall we have lunch?—We will have it when your dad_________.
This_________woman has devoted all her life_________caring for the poor.